“The Walking Dead” scored 13.9 million viewers total viewers Sunday, 9.1 million of them in the key 18-49 demographic. Those numbers were impressive, but down from the show’s premiere last week.

This week, the show faced tougher competition from “Sunday Night Football,” TV’s highest-rated and most-watched show. Last season, and so far this season, “The Walking Dead” has been the top-rated show besides “SNF” in the key demo. Broadcast shows like “NCIS” and “Big Bang Theory” have topped it in total viewers.